Blind nail concealed stitch welt



May 31, 1932. R. c. SCHEMMEL BLIND NAIL CONCEALED STITCH WELT Filed June27, 1928 maaaakw gwueniot I fl/S Gum Patented May 31, 1932 UNITED STATESROBERT C. SCHEMMEL, 0F UNION CITY, INDIANA BLIND NAIL CONGEALED STITCHWELT Application filed June 27,

My present invention relates to welts, gimps and bindings, but moreespecially to finishing welts such as used in the construction ofautomobile tops and vehicle bodies, in the upholstery of furniture, orwherever it is desired to cover up the meeting or overlapping edges ofmaterials and produce a finished effect.

The invention has for an object the production of a novel and attractiveWelt of the blind nail type, made of leather or leatherized fabric,wherein all structural stitches are effectually concealed from view, andwherein there are corresponding or twin bead elements hinged to andsurmounting a base adapted to be forcibly spread apart oppositely forthe introduction of tacks or other fastening means, and, when released,to automatically resume their normally closed contacting relation inparallelism, thereby closing over and concealing the said fasteningmeans, substantially as illustrated.

The invention will be hereinafter particularly described and thenpointedout by the claim following.

In the accompanying drawings which form part of this application forLetters Patent and whereon like numerals indicate corre sponding partsin the several views:

Figure 1 is a fragmentary perspective view, in section at one end, of alength of finishing welt constructed according to the preferred form ofthe present invention;

Fig. 2 is also a fragmentary view in plan showing a portion of welt ofindefinite length having its superimposed hinged members or beadstemporarily spread apart at one point to receive a tack or otherfastening means as shown;

Fig. 3 is a relatively enlarged transverse vertical section through weltand one fastening tack in its closed or operative relation of parts;

Fig. 4 is also a transverse vertical section through welt, but showingthe hinged surface beads fully spread as when receiving a fasteningtack; and

Fig. 5 is one modified form of the invention, being a relativelyenlarged transverse vertical section corresponding substantially withFig. 3, but illustrating a multiple or 1928, Serial No. 288,748.

three-fold overlapping base in piace of that shown by the precedingillustrations, and omitting one line of stitches through each of thesurface beads.

Reference being had to the drawings and numerals thereon, 1 indicates aflexible weltcover or one piece envelope, of leather or a suitablefabric properly leatherized and grained in imitation of leather. Thisleather, or leatherized or other fabric material, when used inconstruction of the present stitchconcealed form. of blind-nail welt, isfirst doubled upon itself on both sides of its longitudinal center, asat 2, 2, adjacent to what eventually becomes the opposite outside edgesof the finished welt. Just inside of the aforesaid cover folds 2, 2, thetwo thicknesses of material are then securely stitched together as at 3,3, these respective rows or lines of stitches eventually serving thepurposes of hinges, as will later appear. The numerals 4, 4, indicatebead cores or fillers made of any suitable material and shape, butpreferably of half-round molded rubber, each having a slight continuoussurface depression 5 in its upper surface just inside of itslongitudinal center to receive a line of stitches 6, by which these coremembers 4 are each securely attached to one fold 7 of the unitary cov'ermaterial 1 starting for example at 8, passes in opposite directionsbeneathand entirely around both core members 4, thence doubles uponitself inwardly as at 1 to form a twoply base as best shown by Figures 1and 4.

When constructed and arranged substantially as shown and described, itwill be noted that heads 4, 4, are capable of being forcibly spreadapart, hinging upon their respective lines of stitching 6, 6, as clearlyshown by Figure 4 of the drawings, to readily permit the introduction ofnails, tacks or other fastening means 9 to be driven into woodwork suchas 10, or other surface serving as a support for the welt. It will beobserved also that when beads 4, 4, are oppositely spread as aforesaid,upon their hinges 6, 6, as a center, the welt base 1 plus 1, is raisedslightly as at 11, 11. The driving of tack 9, however, serves tostraighten out the welt base,

material 1. This cover and by agency of the stitches 3, 3, automaticallyand forcibly returns the beads 4, 4 to their normal closed positionshown by Figure 3, to effectually cover and conceal t e heads of tacks9.

It will also be noted by reference to Figures 1, 3 and 4 of thedrawings, that the continuous longitudinal depressions 5, 5, provide asuitable housing for their respective lines of stitching 6, 6, so thatthe covering 1 for the upper surface of the bead fillers 4, 4, presentsa smooth and sightly appearance.

Referring particularly to the modified Figure 5, it will be noted thatin this instance the stitches 6, 6, are omitted, that the weltbase is athree-ply structure, and that instead of starting from acentral point asindicated at 8 in the preceding figures, the covering material 1 startsat 8 and terminates at 8", thus making a complete under lap of thematerial, which allords an additional base layer, and in thisconstruction, if desired, there may be employed an additional centrallylocated line of base stitches 12.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

A finishing welt comprising a covering fabric having an upper base plyfolded inwardly along its outer edge to provide a bottom bead ply, a topbead ply continuing from the inner edge of the bottom bead ply,extending thence over the outer edge fold common to the upper base andbottom bead plies and having its terminating margin secured to thebottom surface of the upper base ply to form therewith a multi-ply base,a substantially solid core contained between the bottom and the top beadplies, a line of stitching passing through the core and the bottom beadply near the edge fold common to the bottom and top bead plies forsecuring said bottom bead ply and said core together, and another lineot' stitching passing through said upper base and bottom bead pliesonly, close to their common edge iold, securing said plies to gether inhinged relation.

In testimony whereof I affix my signature.

ROBERT C. SCHEMMEL.

